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FireFox window(not the screen) has turned red, since then it has been running very slow.


Just bought a new computer (non Mac), it has windows 8 with an intel i5, Fire fox browser is outlined in red, it was white for about 1 day then turned red. The since it has been outlined in red it either loads web pages very slow or doesn't load them at all. it is running so slow I had to do this from my old computer.

Additional System Details

Installed Plug-ins

  • Shockwave Flash 11.5 r502
  • Google Update
  • Adobe PDF Plug-In For Firefox and Netscape 10.1.4
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Next Generation Java Plug-in 1.6.0_29 for Mozilla browsers
  • GEPlugin
  • 4.0.60531.0
  • iTunes Detector Plug-in
  • Provides additional functionality on Facebook. See our web site for details.
  • npmnqmp 989898989877
  • Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
  • np-mswmp


  • User Agent: Mozilla/5.0 (Windows NT 6.0; rv:12.0) Gecko/20100101 Firefox/12.0

More Information

Options , advanced options, general tab, unclicked use hardware acceleration when available.

  • Top 10 Contributor
  • Moderator
10758 solutions 96832 answers

This can be an indication that some (security) software is running Firefox in a sandbox environment.

Try to boot the computer in Windows Safe mode with network support (press F8 on the boot screen) as a test to see if that helps to identify the cause.